Drink This, You'll Feel Better

You run to your ally (or enemy if you're feeling frisky) and give them a swig of alcohol you have ready so they may channel their inner life force. This causes a surge of natural healing(or at least they think so). If the target creature has at least 1 hit point, it can spend one of its Hit Dice, rolling the die and adding their Constitution modifier to the result. They regain hit points equal to the total (minimum of 1). Once a character has been the target of this spell, they can not use its benefits again until after a short or long rest. 

A creature touched by this spell can spend one additional Hit Die when you reach 5th level (2), 11th level (3), and 17th level (4).